Tip & How-To about Chevrolet Silverado

Handy Automotive 12 volt tester.

Ever have an elctrical part on a vehicle that you needed to test without taking the part off the vehicle? I've been doing this for many years. Just about everybody who works on cars has a battery charger laying around. You can use the battery charger to apply voltage to activate whatever part needs testing. Just put the battery charger on the lowest amp setting, and clamp straightened out metal paperclips in the charger's alligator clips. Use these probes to apply voltage to switches, motors, light bulbs, whatever uses 12VoltsDC. By using an extension cord, it will reach anywhere on the venicle. And, if you have a portable battery charger/booster, you now have a mobile tester.

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how do I change computer on 2002 Chrysler concorde


Changing the computer is easy , it's what comes next that is the difficult part . Changing computers requires programming the new one . Dealer only ! Special tools needed .
Looking at a wiring diagram to see what all is involved in the elctrical circuits would be a good first step . Then leaning how to trouble shoot automotive electrical systems would be good also. Do you know what a wiring diagram is ? How to read an interpret what's going on in the circuit ? How to do voltage drop testing on main B+ cable to the starter solenoid ? How to test the starter relay ( control side of the starter ) ? Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size. Under system click on engine ,then under subsystem click on starting . Click the search button then the blue link.
Testing where the relay plug's into the fuse / relay box.

Relays Understanding Diagnosis and Testing Relayed Circuits Pt1
The starting motor relay in your vehicle is controlled by the PCM - engine computer . The PCM will supply a ground path for the coil side of the relay , if it see's an input fro the transmission range sensor switch, an there is no anti-theft system problem's . You can test at the relay for B+ voltage at two of the pin's an a ground through the starter an control from the PCM .
Starter Voltage Drop

Oct 22, 2017 | Chrysler Cars & Trucks

1 Answer

How can i tell if the thottle position sensor is bad without a multi meter and how do you adjust it when reinstalling


What make , model an year vehicle ? An engine size . Most TPS sensors are non adjustable . An you can't tell if it's bad without testing . Suggest you take your vehicle to a qualified repair shop that know how to test an replace a TPS , because i think your just guessing , looking for a magical fix .That's not how we repair automobiles .

Mar 21, 2017 | Cars & Trucks

2 Answers

hard starting


Spark Plugs--Changed every 3 years?

Ignition Wires or COP Coils original to car (2000) ?

Battery more than 4 years old & tested?

Fuel Pressure Checked-Before & during starting attempt?

Back probed & tested TPS Sensor?

Can't just drive any vehicle,they have to be in the shop
a couple times a year, to do preventative maintenance,look
at data & road test,shops don't do much,you have to educate
yourself & unfortunately it has come to the point that you have to
tell them what to do & only what you want done,no skills or talent
left in the auto trade & the technology has passed them by, for good

You do not need to touch a gas pedal, to start any car,in the last 30
years,they are all electronic & fuel injected

Apr 08, 2014 | 2000 Lincoln Continental

1 Answer

replacing ve commodore a/c evaperator


No-- this is a chat room or social web site,
we have no idea what the problem is ,or the
repairs required, without a vehicle to test

You need to do as you always have with all
vehicle issues & visit a repair shop to discuss
solutions & repair costs

Mar 15, 2014 | Cars & Trucks

1 Answer

2004 Chevy Cavalier - car cranks over but won't start


Well, let me try to say this without being too offensive.....
Your car only quit running on you once. I find it really hard to believe that all of the parts you replaced so far, needed to be replaced to get the engine running again. It is EXTREMELY UNLIKELY that all of these "failures" would occur all at the same time.

You would rather pay for $500+ in parts that the car apparently did not need, than to pay to have it towed to a shop where they have the knowledge, training and equipment necessary to properly diagnose the vehicle and get it running again? And now you want someone to tell you what is causing the problem with your vehicle without the benifit of any diagnostic testing?

There is NO WAY that ANYONE can accurately tell you what is wrong with your vehicle without following the correct diagnostic procedures recommended by the vehicle manufacturer. The most anyone can do online without proper diagnosis and testing is GUESS! You seem to be doing that very well on your own.

May 31, 2012 | 2004 Chevrolet Cavalier

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